Fastener



FIG. 1 is a top plan view of a fastener showing my new design;

FIG. 2 is a perspective view of FIG. 1, the threaded shank shown broken away to indicate indeterminate length;

FIG. 3 is a perspective view of a second embodiment of the design of FIG. 1, the only difference being the use of a pan-type head. 

The ornamental design for a fastener, as shown. 